Description
The quaternary pump G1311A comprises a solvent cabinet, a vacuum degasser and a four-channel gradient pump. The four-channel gradient pump comprises a high-speed proportioning valve and a pump assembly. It provides gradient generation by low pressure mixing. Degassing is a must for a low-pressure gradient system therefore the Agilent 1200 Series vacuum degasser is part of the quaternary pump system. A solvent cabinet provides enough space for four one-liter bottles. An active seal wash (optional) is available when the quaternary pump is used with concentrated buffer solutions.
G1311A Quaternary Pump HPLC 1200
Delay volume: 800–1100 μl, dependent on back pressure
Materials in contact with mobile phase
| DCG | PTFE |
| Pump head | SST, gold, sapphire, ceramic |
| inlet valve | SST, gold, sapphire, ruby, ceramic, PTFE |
| Outlet valve | SST, gold, sapphire, ruby |
| Adapter | SST, gold |
| Purge valve | SST, gold, PTFE, ceramic, PEEK |
| Damping unit | Gold, SST |
Performance Specification Agilent 1200 Series Quaternary Pump G1311A
| Hydraulic system | Dual plunger in series pump with proprietary servo-controlled variable stroke drive, floating plungers and active inlet valve |
| Setable flow range | 0.001 – 10 ml/min, in 0.001 ml/min increments |
| Flow range | 0.2 – 10.0 ml/min |
| Flow precision | £ 0.07% RSD, or £ 0.02 min SD whatever is greater, based on retention time at constant room temperature |
| Flow accuracy | ± 1% or 10 μl/min whatever is greater |
| Pressure | Operating range 0 – 40 MPa (0 – 400 bar, 0 – 5880 psi) up to 5 ml/min Operating range 0 – 20 MPa (0 – 200 bar, 0 – 2950 psi) up to 10 ml/min |
| Pressure pulsation | < 2 % amplitude (typically < 1 %), at 1 ml/min isopropanol, at all pressures > 1 MPa (10 bar) |
| Compressibility compensation | User-selectable, based on mobile phase compressibility |
| Recommended pH range | 1.0 – 12.5, solvents with pH < 2.3 should not contain acids which attack stainless steel |
| Gradient formation | Low pressure quaternary mixing/gradient capability using proprietary high-speed proportioning valve Delay volume 800 – 1100 μl, dependent on back pressure |
| Composition Range | 0 – 95 % or 5 – 100 %, user selectable |
| Composition Precision | < 0.2 % RSD, at 0.2 and 1 ml/min |
| Control and data evaluation | Agilent control software (e.g. ChemStation, EZChrom, OL, etc.) |
| Communications | Controller-area network (CAN), GPIB, RS-232C, APG Remote: ready, start, stop and shut-down signals, LAN optional |
